2007 Fiscal Year Final Research Report Summary
3D microscopy based on optical frequency comb by RF control
| Project/Area Number |
18360164
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
KUROKAWA Takashi Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Professor (40302913)
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| Co-Investigator(Kenkyū-buntansha) |
SHIODA Tatsutoshi Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Assistant Professor (10376858)
TAKEDA Mitsuo The University of Electro-Communications, Department of Information & Communication Engineering, Professor (00114926)
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| Project Period (FY) |
2006 – 2007
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| Keywords | microscopy / optical frequency comb / interferometer / OCT / 干渉計 / トモグラフィ |
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| Research Abstract |
In our previous report, the optical frequency comb generator consisting of two phase modulators in tandem we used generated the narrow bandwidth of the comb spectrum, only 2 nm, and resulted in the limited resolution up to 300μm. And some noises of many side-lobes appeared around the interferometric peaks due to a rectangular frequency comb spectrum. Furthermore, it took a long time for the data acquisition because the point-to-point scanning was used in a fiber-optic interferometer.
To improve the performance of our previous system, we introduced new functions of a broad band frequency comb and a line-type image sensor to realize a frequency comb-based interferometric microscope. One of the improvements in the proposed system is that a broadband frequency comb spectrum of over 10 nm was obtained by combining a waveguide type-frequency comb generator^<6-8)> consisting of the phase modulator installed in the Fabry-Perot cavity and a subsequent wavelength equalizer^<9)>. The depth resolut
… More
ion is finally improved up to 35 μm, and the side-lobes in the interferometric signals also disappeared. Another important improvement is to realize a high-speed observation of three-dimensional images by the use of a line type-image sensor for capturing a line image in a horizontal direction at a time.
The measurement resolution narrowed finally to 35 μm by introducing the waveguide-type frequency comb generator and the wavelength equalizer. Furthermore, introducing the line image sensor can obtain the simultaneous measurement of the whole horizontal cross sectional image of the interferometric signal. We successfully demonstrated the 3 dimensional surface profilometry of a Japanese 10-yen coin and observation of a cross sectional tomography image of transparent thin films by varying the comb frequency interval without mechanical shift. The dynamic range in the depth direction was about 1.1 mm and the measurement resolution was 35μm. The standard deviation of seven times thickness measurements was 5μm. Less
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[Journal Article] 1 MHz-resolution spectroscopy based on light frequency sweeping using a single-sideband optical modulator2007
Author(s)
T., Shioda, T., Yamamoto, T., Sugimoto, Y., Tanaka, K., Higuma, T., Kurokawa
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Journal Title
Japanese Journal of Applied Physics 46 6A)
Pages: 3626-3629
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Frequency-comb-based interferometer for profilometry and tomography2006
Author(s)
S., Choi, M., Yamamoto, D., Moteki, T., Shioda, Y., Tanaka, T. Kurokawa
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Journal Title
Optics Letters 31 13)
Pages: 1976-1978
Description
「研究成果報告書概要(欧文)」より
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[Presentation] supercontinuum frequency comb generation by optical pulse synthesizer and its application to interferometry2008
Author(s)
N., Tamura, S., Choi, T., Shioda, Y., Tanaka, T., Kurokawa
Organizer
Annual Meeting of JSAP, 29a-ZB-16
Place of Presentation
Chiba
Year and Date
20080300
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 25 GHz supercontinuum frequency comb generation by optical pulse shaping2007
Author(s)
S., Choi, R., Kobe, T., Shioda, Y., Tanaka, T., Kurokawa
Organizer
Optics Photonics Japan 2007 (OPJ2007), 26aD5
Place of Presentation
Osaka
Year and Date
20071100
Description
「研究成果報告書概要(欧文)」より
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[Presentation] High-resolution spectroscopy using optical phase modulator and heterodyne-detection2007
Author(s)
T., Shioda, T., Mori, T., Sugimoto, Y., Tanaka, T., Kurokawa
Organizer
CLEO-PR2007, WG3-6
Place of Presentation
Seoul
Year and Date
20070800
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Frequency Comb-based Interferometry Using a Line-type Image Sensor2006
Author(s)
S., Choi, T., Sugimoto, D., Moteki, T., Shioda, Y., Tanaka, T., Kurokawa
Organizer
12th Microoptics Conference, 2006, H-3
Place of Presentation
Seoul
Year and Date
20060900
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Interferometry for profilometry and tomography using frequency comb generator2006
Author(s)
S., Choi, T., Sugimoto, D., Moteki, T., Shioda, Y., Tanaka, T., Kurokawa
Organizer
37th meeting on lightwave sensing technology, LST37-6
Place of Presentation
Tokyo
Year and Date
20060600
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Interferometer for profilometry and tomography using waveguide-type frequency comb generator2006
Author(s)
S., Choi, D., Moteki, T., Sugimoto, T., Shioda, Y., Tanaka, and T., Kurokwa
Organizer
CLEO/QELS2006, CMY7
Place of Presentation
Long Beach
Year and Date
20060500
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Interferometry using a frequency comb generator and line-type image sensor2006
Author(s)
S., Choi, Y., Itagaki, D., Moteki, T., Shioda, Y., Tanaka, T., Kurokawa
Organizer
Annual Meeting of JSAP, 28p-S-14
Place of Presentation
Kanagawa
Year and Date
20060300
Description
「研究成果報告書概要(欧文)」より
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